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Terms for subject Environment containing | all forms
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从沉淀室排出的在养殖单元底部积累的固体物质和水的混合物。污水处理中:在大部分液体从污水中除去后保留下来的泥泞、半固体沉淀物.sludge
全球动态植模型dynamic global vegetation model
年死物生产annual litter production
有机死organic litter
森林植破坏forest cover destruction Destruction of forests is carried out in many countries in order to provide new land for agricultural or livestock purposes. It is often done without factors such as climate and topography having been sufficiently studied and on lands where slope nature of the soil or other physiographic characteristics clearly indicate that the land involved is suitable only for forest. Although these practices may lead to a temporary increase in productivity, there are also many indications that in the long run there is usually a decrease in productivity per unit of surface and that erosion and irreversible soil deterioration often accompany this process. Many factors contribute to forest cover destruction: timber production, clearance for agriculture, cutting for firewood and charcoal, fires, droughts, strip mining, pollution, urban development, population pressures, and warfare (森林的破坏在许多国家都在进行,为农业或畜牧业提供了新的土地。这种开发通常没有经过对气候地形的充分研究,通常也没有考虑这片土地的斜坡性质或其他自然地理特征可能只适合森林。虽然这些做法可能导致暂时增加生产力,从长远来说,通常在每单位面积的生产力下降,土壤的侵蚀和不可逆转的恶化往往伴随着这一过程。许多因素造成了森林覆盖率的破坏:木材生产,农业需要,为切割金属而需要的木柴和木炭,火灾,旱灾,条带开采,污染,城市发展,人口的压力,和战争。)
vegetation 1. The plants of an area considered in general or as communities, but not taxonomically; the total plant cover in a particular area or on the Earth as a whole. 2. The total mass of plant life that occupies a given area (1. 一个地区总体的或群落的植物,但未被分类的;覆盖在某一特定地区或整个地球的所有植物。2.占据某一区域的植物体的总称。)
水平vegetation level A subdivision of vegetation characteristic of a certain altitude above sea level at a given latitude (在给定纬度的特定海拔高度上的植被特征细分。)
类型vegetation type A community of plants or plant life that share distinguishable characteristics (有着共同区别特征的一群植物或植物生命。)
覆盖vegetation cover Number of plants growing on a certain area of land (在特定地区的土地上生长的许多植物。)
子植物angiosperm The class of seed plants that includes all the flowering plants, characterized by the possession of flowers. The ovules, which become seeds after fertilization, are enclosed in ovaries. The xylem contains true vessels. The angiospermae are divided into two subclasses: Monocotyledoneae and Dycotiledoneae (一种包括所有的有花植物的种子植物纲。胚珠在子房内,受精后成为种子。木质部包含导管。被子植物门分为两个亚纲:单子叶植物纲和双子叶植物纲。)
批准的approved
迫离家者displaced person Persons who, for different reasons or circumstances, have been compelled to leave their homes (因各种理由或情势,被迫强制离开家园的人。)